class B{
  int n;
   static int sum=0;
   void setN(int n){
   this.n=n;
  }
  int getSum(){
    for(int i=1;i<=n;i++)
    sum=sum+i;
   return sum;
 }

}
public class ex33{
  public static void main(String args[]){
   B b1=new B(),b2=new B();
  b1.setN(3);
  b2.setN(5);
   int s1=b1.getSum();
   int s2=b2.getSum();
  System.out.println(s1+s2);
  }
}
